We are encumbered with so many unnecessary thing. So our so-called necessities of life will decrease. Anartha upaśamam . Although we are riding on motor car, we don't think it is essential. But those who are captured by the civilization, they think it is essential. That is the difference. Anāsaktasya viṣayān.
Our process is that if we have to preach, so we have to go to United States. So if there is aeroplane, why shall I waste my time? Let us accept this thing. So we don't deprecate the material advancement. But we simply warn that "Don't forget Kṛṣṇa simply for the matter of material advancement." This is Kṛṣṇa consciousness. We don't discourage you. We don't discourage you, but when you have invented something material, utilize it for Kṛṣṇa.